Haley Walker hangs onto a sheep in the "Mutton Bustin'" competition at the 108th National Western Stock Show in Denver

Haley Walker, 5, hangs onto a sheep in the "Mutton Bustin'" competition at the 108th National Western Stock Show in Denver January 11, 2014. The show, which features more than 15,000 head of livestock, opened on Saturday and runs through January 26. REUTERS/Rick Wilking (UNITED STATES - Tags: ANIMALS SOCIETY TPX IMAGES OF THE DAY)